The invention relates to an unmanned ship device and sampling method for automatic sampling of the
water quality. The unmanned ship device comprises an unmanned ship body, an energy and
control unit arranged in a bin of the unmanned ship body, and an automatic
water quality sampling unit. The automatic
water quality sampling unit comprises a sampling
bottle, a supporting body mechanism for installation of the sampling
bottle, a sampling pump arranged on the outer side of the unmanned ship body, a sample hose connected with the sampling pump, and an oscillating arm water-fetching mechanism forcontrolling the sampling hose to rotate. The oscillating arm water-fetching mechanism comprises a hollow
pipe nested on the outer side of the
tail section of the sampling hose, and a first stepping motor connected with the end, close to the sampling pump, of the hollow
pipe. By means of the unmanned ship device and sampling method for automatic sampling of the water quality, water quality samplesof multiple sampling sites can be collected sequentially in a working cycle, the samples can be analyzed synchronously after being sent back, the sampling efficiency is further improved, and water quality samples of different areas or watersheds can be conveniently, quickly and automatically collected.